Navigator wrote:
This makes no sense to me.

Uh-oh...

... The radar does not have significant rotation
(certainly not 180 degrees) between pulse emission and reception.

Well, if the rotation is adjusted, most of the time ghost returns fade
or at least shift, revealing which is the true return. I didn't claim to
explain why.

Where's Gilligan!

In the dresser drawer with all the other socks.

DSK